Bobbin and bobbin clutching spindle



Dec. 1, 1931. .G. R. Gol-"F 1,834,914

BOBBIN AND BOBBIN CLUTCHING SPINDLE Filed Nov. 6, 1929 Figi- \n\/enTor.

George RISO FF A1B/s` Patented Dec. 1, 1931 UNITED STATES PATENT OFFICE GEORGE RUSSELL GOFF, F I-IOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COR- IPORA'IION, OFf HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE BOBBIN AND BOBBIN CLUTCHING- SPINDLE v ikApplcation yfiled November 1929. Serial No. 405,134.

This invention relates to that type of .spinning apparatus in which a rotatable spindle having a plurality of centrifugally-acting clutching members is employed. In this type of apparatus the rotation of the bobbin with the spindle is secured by the radial pressure of the clutching members against the wall of the bore in the butt of the bobbin. When starting and stopping the spindle the frictional pressure thus exerted is insuflicient to secure the desired rotation of the bobbin with the spindle. l

The object of the present invention is to providea construction in which a positive driving engagement will take place between the clutching members and the bobbin when ever there is any rotary slippage between the bobbin and the spindle.

Such a positive driving connection was broadly provided in the construction disclosed in the patent to Draper, No. 760,973, May 24, 1904, but in that case the clutching members acted directly against the material of the bobbin itself which was commonly wood', and the positive driving connection was secured by a metal pin or by a configuration of the wood of the bobbin.

In the present invention a metal bushing is provided which is secured in place in the bore of the butt of the bobbin and this bushing is so constructed as to afford the desired positive driving engagement with the clutching members. By this means the rotary equilibrium of the mass of the bobbin and the spindle under all conditions is not disturbed whether the driving engagement between the clutching members and the bobbin be purely trictional or partly trictional and partly positive and all danger of disturbance of equilibrium by Wear of the bobbin is prevented.

The nature and objects of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claim.

The invention is applicable to any type of spinning apparatus in which a rotatable spindle having a plurality of equally-circumferentially-spaced centriugally-acting clutching members is employed and for pur- 'vention Fig. 2 is a view on a larger scale with all the parts excepting the spindle blade shown in vertical cross section. i

Fig. 3 is a view in perspective of one form of metal bushing embodying the invention.

The spindle illustrated comprises the usual blade 1 with the whirl 2 rigidly secured thereto. The upstanding portion f5 of the whirl at its upper face is provided with the concentric recess ai. and is covered by an annular cap 5 having a driven fit thereon and presenting at its upper face the bobbin seat 6. The clutching members 7 are each of similar construction and are equally spaced circumterentially about the spindle, being here shown as tour in number. Each clutching member is here shown as tulcruming at 8 directly on the spindle blade l. Each clutching member at its lower end is shown as having a radial outwardly projecting foot 9 located in the recess 5 and at its upper end a lin 10 extending within the retaining and spacing cap or sleeve l1 secured to the spindle blade. These yclutching members rock outwardly under the influence of the annular spring 12 surrounding and resting upon the feet 9. These members are also heavily weighted above the fulcrum points so as to be subject to a substantial centrifugal :torce when the bobbin is rotating at the usual speed.

In this invention the bore 13 ot the bob bin has secured therein, as by a driving lit, a metal bushing 14, a preferred form of which is shown separately in Fig. 3. This bushing is of such a diameter that normally the clutching member 7 will be pressed by the spring 12 and by centrifugal action against the inner 'surface l5 thereoflto ellect the drive of the bobbin from the spindle.

In order to secure the desired positive driving engagement between the spindle and the bobbin whenever there is any slippage, this bushing is provided with similar recesses 16 and similar ribs 17 intervening between the recesses 16. These recesses and ribs may take any desired form, but in the preferred construction the recesses 16 are formed asslots extending through the metal of the bushing /while the ribs 17 are formed by the material of the bushing extending between lthe slots. The ribs 17 thus broadly constitute projections as compared radially with the slots or recesses 16. Y

The similar recesses 16 are equally-circumferentially-spaced and each recess is of a width knot less than the width of the .corresponding clutching members, suchy as7, so thatwhen a Vclutching member swingsradially outward opposite a recess, it may project into the rehaving a plurality of symmetrically located, centrifugally acting clutch members, with a bobbin having a metal bushing Ain a bore in the butt thereof, saidbushing having a plurality of symmetrically located recesses circuinferentially spaced to cooperate with certain of said clutch members only to form a positive driving connection'with the bobbin through the said metal bushing, the clutch members located between the said recesses frictionally engaging the bushing-tothereby center the bobbin on the spindle.

Intestimony whereof, I have signed my name to this specilication. i GEORGE RUSSELL GOFF.

cess. The number of the recesses 16 must be an aliquot ora multiple of the number of the clutching memberszin vorder to prevent any disturbance of the equilibrium of the bobbin and spindle mass. For. example, in the case illustrated, there are two recesses 16,.,which is an aliquot of the four clutching members 7 illustrated, Y the recesses being, therefore, spaced apart a ldistance which is greater than ythe width of the respective recesses.

j It will thus be seen in the operation of the mechanism that if any slip-page takes place between the spindle and the bobbin, at least one pair ofi-similarly disposed bobbin clutching members drops into one pair of similarly rdisposedrecesses inthe bushing and at once effectsa positive driving engagement there- 'with7 the leading edges of the bobbin cliitching members engaging the edges of the recesses or the edges of the intervening ribs.

It is of greatest importance that the equilibrium of the bobbin and spindle mass shall Vnot be disturbed. Otherwise the bobbin and spindlev vvill vibrate when rotating at high speed and uneven` spinning of the yarn will result. In this Vinvention the equilibrium is maintained under all conditions and the posiif CTI tive driving engagement is secured whenever there is any slippage. Furthermore there is no danger of the equilibrium being disturbed y as thel result of wear because the clutching members under all conditions cooperate with the metal of the bushing.

The clutching members vare cammed inwardly by the metal bushing when tliebobbin isplaced in position and they are also camined intoV the' recesses whenever rotary slippage takes place between the spindle and the bobbin so that metal surfaces, subject to a minimum wear, are always co-acting whenevei` a relative movement takes place between the bobb-in and thespindle. Y

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is: .A

r The combination of a rotatable spindle .ici 

